Jaw-wrench.



N0. 759,824, PATENTED MAY 1o', 1904.

w. w. MURCH.

JAW WRENCH.

APPLIGATION FILED AUG. 7. 190s.

WITNESSES: /NVENO/ A TTOHNE YS.

No. 759,824. PATBNTED MAY 10, 1904. W. W. MURGH. JAW WRENCH.

APPLICATION FILED AUG. 7. 1903.

, Mabel A TTU/MI5 YS No. vsaeea.A

UNITED STATES Patented May 10,` 1904.

PATENT OEEICE.

VVlLLIAlVI WARNER MUROH, OF NEW YORK, N. Y., ASSIGNOR OE ONE-HALF TO SAMUEL SPRAG-UE HOLDEN, OF NEW YORK, N. Y.

JAW-WRENCH.

SPECIFICATION forming part of Letters Patent No. 759,824, dated May 10, 1904.

Application filed August 7, 1903.

T0 (all whom, ift may con/cern:

Be it known that I, WILLIAM WARNER MURCH, a citizen of the United States. and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new and Improved J aw-l1enclI, of which the following is a full, clear, and exact description.

The object of the invention is to provide a new and improved jaw-wrench arranged to permit the operator to readily open or close the jaws to snugly fit the article to be turned and to allow convenient turning of the jawcarrier and the jaws thereon in either a forward or backward direction.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a sectional face view of the improvement. Fig. 2 is a sectional plan view of the same. Fig. 3 is a face view of the improvement, and Fig. 4 is a perspective view of one of the jaws.

The head A of the wrench is provided with a suitable handle B, adapted to be taken hold of by the operator for conveniently manipulating the wrench, as hereinafter more fully explained, and in the said head is formed a bearing for a revoluble jaw-carrier O, formed of top and bottom disks C' and O2, and a ratchet-wheel O, interposed between the said disks and fastened to the same by rivets O', as plainly shown in the drawings. The disks O' and O2 are formed with diametrically-disposed slots O5 and l, and in the slot O5 are mounted to slide toward and from each other jaws D and D', between which the article to be turned is engaged when using the wrench, as hereinafter more fully described. The

jaws D and D' are provided with shanks D2 and D3, engaging curved slots E' and E2 in a disk E, mounted to turn in the ratchet-wheel C of the jaw-carrier O, and on the said disk the same with the lugs D'L and D" to securely sean No. 168,628. ma man.)

E is secured a handle F, under the control of the operator, for turning the said disk E to move the jaws D and D' toward and from each other in the slot C5 of the jaw-carrier to engage or disengage the article to be turned.

On the ends of the shanks D2 and D3 are 55 pivoted lugs D4 and Df, having' their bottoms beveled and engaging the beveled face of a jam-nut F2, screwing on the threaded shank E' of the handle E to lock the lugs D'L and D5, and consequently the jaws D and D', in position after the jaws are adjusted toward or from each other on turning the handle F, as previously mentioned. The jam-nut F eX- tends through a suitable guideway A', attached to the head A or to the ring O2 on the face opposite the one on which the jaws D and D' project, (see Eig. 2,) and by this arrangement dust and other impurities are prevented from passing to the working parts of the wrench, as above described.

Now from the foregoing it will be seen that when the jam-nut F2 is unscrewed on the shank E' and the operator turns the handle F then the disk E is turned to cause Vthe jaws D and D' to move toward or from each other, according to the direction in which the handle F is turned, and when the jawsD and D' have been adjusted the desired distance apart then the operator screws the jam-nut E" up to engage lock the lugs, and consequently the jaws, in position to holdv the jaws against accidental displacement. Now in order to impart a ratchet movement to the j avv-carrier O and the jaws D and D', as well as to the disk E, handle F, and J nut F52, the following device is'provided: The ratchet-wheel O" of the jaw-carrier O has each side of each tooth formed of two bevels extending inwardly, as plainly indicated in Eig. l, and the teeth of the ratchet-wheel are adapted to be engaged by a pawl G, mounted to slide lengthwise in the bore B' of the handle B and adapted to be givena half-turn in the said handle by the operator for reversing the pawl to turn the ratchetLwheel, and `consequently the jaw-carrier and jaws, in a reverse direction whenever it is desired to do so. The pawl Gr is provided with a reduced stem G', terininating at its outer end in a knob G2, the shank G3 of which is polygonal in cross-sed tion to engage acorrespondingly-shaped recess or socket B2, formed in the outer end of the handle B at the bore B' to hold the pawl G against turning as long as the shank G3 engages the said socket B2. Now when the operator pulls the knob G2 outward to diseng'age the shank G3 from the socket B2 then the operator can give a half-turn to the pawl G to reverse the same relative to the teeth of' the ratchetwheel C3. T he pawl Gis held normallyin an innermost position-that is, in engagement with a tooth of the ratchet-wheelby the action of a spring H, coiled on the stem G within the bore B', one end of the spring resting on a collar I, fastened to the stem G, the other end of' the said spring' abutting against a collar I', having a transverse pin l2, fitting' a longitudinal slot Gt, formed in the stem G'. The collar 'I/ rests against a bearing J, in which the stem G is fitted to slide, the bearing being fastened in the bore B by set-screws J screwing in the handle B, as plainly indicated in Fig. 1. Normally the spring H holds the pawl G in an innermost position for the pawl to engag'e the teeth of the ratchet-wheel; but the said spring allows the pawl to slide outward when its beveled back glides over the outer bevel of an adjacent tooth on the return stroke of the handle B; but this outward movement of the pawl G is not suicient to disengage the shank G:S from the socket B2, and consequently the pawl G is not liable to turn accidentally while using' the wrench. Vhen, however, the operator pulls the knob G2 outward to disengage the shank G3 from the socket B2 i'or reversing the position of the pawl G by giving' a half-turn to the pawl, as previously described, then the springH is pressed, and as soon as the operator releases the knob G2 the spring returns the pawl to its innermost reversed position.

W'hen the wrench is used and the ,nut or like article to be turned is engaged between the jaws D and D, as previously described, then the operator on swinging the handle B in the direction of the arrow a causes the pawl G to engage the innermost bevel of the first tooth on the ratchet-wheel C3, thereby turning the ratchet-wheel, and consequently the jaw-carrier and with it the jaws D and D, to turn the nut or like article. Vhen the operator swings the handle B in the inverse direction of the arrow d, then the beveled back of the pawl G glides over the outer bevel oi' the next rearward tooth, and consequently the jawcarrier and connected parts remain at a standstill during the return stroke of the handle B, and on the next forward stroke of the handle the jaw-carrier, jaws, and nut engaged are again turned, as above described. When the nut of' a wagon-axle, for instance, has been unscrewed, it ca'n be readily held between the jaws D and D, and when it is desired to again screw the nut upon the axle then the operator first pulls thc knob G2 outward, then gives a a half-turn to the pawl, after which the pressure on theV` knob G2 is released, so that the pawl Greturns to its former position, but reversed, and consequently when the operator imparts a swinging motion to the handle B in the direction of the arrow a then the pawl glides over the teeth of the ratchet-wheel C3, and the jaw-carrier, jaws, and nut remain stationary, and on swinging the handle B in the inverse direction of the arrow a the said jawcarrier, jaws, and nut are turned to screw the nut upon the axle.

Then it is desired to remove the pawl G for repairs or other purposes, it is only nec; essary'to loosen the set-screws J and to pull on the knob Geto draw the entire pawl, spring H, collars 1 and-I', and bearing J out of' they,

From the foregoing it will be seen that a Y forward or backward ratchet motion can be given to the jaw-carrier and its jaws, and the jaws can be readily adjusted toward or from each other to snugly fit the article to be turned, and the jaws can be securely locked in position after they are adjusted by screwing up the jam-nut F2, as previously explained.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. Awrench having a handled head, a jawcarrier mounted to turn in the said head, a disk inside said carrier mounted to turn therein and provided with curved slots, jaws fitted to slide toward and from each other in the said jaw-carrier and having Shanks engaging the said slots, means connected with said disk and extending to the outside of the head for turning the said disk, and means for locking the said jaws in position after they are adjusted, as set forth.

2. A wrench having a jaw-carrier mounted to turn, a disk mounted to turn in the carrier and provided with curved slots, jaws fitted to slide in the jaw-carrier and having shanks engaging the said slots, beveled lugs on the said shanks, and a jam-nut for engaging the said lugs, as set forth.

8. A wrench having a jaw-carrier mounted to turn, a disk mounted to turn in the carrier and provided with curved slots, jaws fitted to slide in the jaw-carrier and having shanks engaging the said slots, beveled lugs on the said shanks, a jam-nut for engaging the said lugs, and a threaded handle for turning the said disk and on which screws the said jam-nut, as set forth.

4. A wrench having a handled head, a jawcarrier mounted to turn in said head, a rotatable disk within said carrier, said disk having oppositely-disposed eccentric slots, jaws IOO IOS

IIO

fitted to slide to and `fronn each other in said carrier and having shanks engaged by said slots, and a bolt connected with said disk atI the center thereoi| for rotating the disk, said bolt extending outwardly between the jaws of the wrench and projecting at one side of the handled head. i

5. A wrench having a jaw-carrierrnounted to turn, a disk mounted to turn in the carrier and provided with curved slots, jaws litted to slide in the jaw-carrier and having shanks engaging said slots, beveled lugs on said shanks, a bolt engaging said disk to rotate the same, said bolt having a threaded portion, and a beveled nut carried upon the threaded portion of said lbolt for engagingl said beveled lugs to lock said jaws.

6. A wrench having a handled head, a jawcarrier mounted to turn in said head, said jawcarrier comprising parallel disks held on opposite sides of said head and having parallel diainetrical slots, a ratchet-ring between said disks and rigidly connected therewith, a central disk litting within said ratchet-ring and provided with eccentric slots, jaws litted to slide in the slots formed in said lirst-named disks and having Shanks engaged by the slots in the central disk, a bolt engaging said central disk to rotate the saine and extending outwardly beyond the head of the wrench, at the rear side thereof, said Shanks oiLl the jaws carrying beveled lugs also extending outwardly beyond the rear side of said head, a beveled nut carried upon said bolt for engaging' said lugs to lock the jaws, and, a reversible springcontrolled pawl for engaging said ratchetring.

In testimony whereof I have signed my narne to this specilication in the presence oil two subscribing' witnesses.

WILLIAM WARNER lVlULRCl-l.V

Witnesses:

TIMOTHY N. HOLDEN, SAMUEL S. HOLDEN. 

